4. Do I have to be a Prime Member to shop what Amazon is calling “Prime Day”?

Amazon’s sales are available only Amazon Prime members, but the site is offering free 30-day membership trials so you can take part.

5. How will “Prime Day” work?

There will be thousands of “Lightning Deals” on all types of products, with new deals appearing as often as every 10 minutes.

6. What is a “Lightning Deal”?

A limited-time promotion where a “limited number of discounts are offered on an item.” These deals are “available, one per customer, until either the promotion period for the deal expires or all the available promotional discounts are claimed.”

7. How will Walmart’s sale work?

The retailer is launching what it calls “Atomic” with substantial savings and will also have about 2,00 new rollbacks online.